<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/vue-2.6.10.js"></script>

</head>

<body>
<div id="app">
    <input type="radio" value="Java" v-model="language">Java<br>
    <input type="radio" value="PHP" v-model="language">PHP<br>
    <input type="radio" value="C++" v-model="language">C++<br>

    <h2>您选择了:{{language}}</h2>
</div>
<script type="text/javascript">
  var app=new Vue({
    el:"#app",
    data:{
        language:[]
    }
  })
</script>
</body>
</html>